In particular, Ailin's mastery of Kido came from the great masters of more than two hundred years in the future. Even Urahara Kisuke's current Kido seemed somewhat immature before Ailin.
At first, Ailin had merely assisted Urahara Kisuke, filling in the gaps and correcting omissions.
But later, seeing that the three-day deadline he had agreed upon with Ginrei Kuchiki was approaching, Ailin directly shoved Urahara Kisuke aside and laid out the barrier himself, completing the Sky Canopy.
"Finally finished."
Wiping the sweat from his forehead, Ailin let out a soft breath.
Then, Ailin poured spiritual pressure into the barrier within the Sky Canopy.
"Bzz..."
In an instant, the dirt and gravel above the underground base, clearly illuminated by the Sky Illuminating Sphere, transformed into blue skies and white clouds.
Even when there was the slightest breeze in the underground base, the clouds in the sky slowly drifted with it.
"That's incredible!"
Even Urahara Kisuke had to admit that the Kido he took pride in was still nowhere near enough before Ailin.
Just how had this guy trained?
Urahara Kisuke placed even greater importance on Ailin's abilities.
Of the four Shinigami arts—Zan, Ken, So, Ki—Kido was far more difficult to practice than the other three.
Whether it was Hakuda, Zanjutsu, or Shunpo, none had demanding requirements for a training ground. With an open space, one could train alone.
But Kido was different.
Kido, especially high-level Kido, was enormously destructive. A single use could cause severe damage to the surroundings.
To master a Kido to the point of Kishōtenketsu, one had to practice it at least a thousand times and know the Reishi construction of that Kido by heart.
Urahara Kisuke estimated that since Ailin could complete such a precise and vast Kido barrier, even if he used Kishōtenketsu for a Kido